Miru Project - A versatile application that is free, open-source, and supports extension sources for videos, comics, and novels, available on Android, Windows, and Web platforms.
NeeView - Display two images simultaneously
TachiyomiAZ - Free and open source manga reader for Android
Soda PDF 3D Reader - Read any PDF document like a book using our patent pending 3D technology!
Aniyomi - Aniyomi is an unofficial fork of the free and open source manga reader Tachiyomi that adds anime capabilities!
ACBF Viewer - Comic book reader.